git hook to run a command after `git pull` if a specified file was changed.In this example it's used to run `npm install` if package.json changed and `bower install` if `bower.json` changed.Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

post-merge

#/usr/bin/env bash
# MIT © Sindre Sorhus - sindresorhus.com
# Forked by badcrocodile to check for changed files in a specified directory

# git hook to run a command after `git pull` if any files in a specified directory have been changed
# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

check_run() {
	echo "$changed_files" | grep --quiet "$1" && eval "$2"
}

# Run `composer dump-autoload` if any file in the ccof directory has changed.
check_run ccof/* "composer dump-autoload -o"